Improvement in hoistim-geab



v@einer tetra @anni @Hina HENRY F.. SHAW, OF WEST ROXBURY, MASSACHUSETTS. Learspaamlvo. 64,915, dated May 21,1867.

L IMPROVEMENT IN HOISTING-GEAR.

@be Stimuli aferra tu in that Enters rtmt rmt making gaat nf the am.

To ALL WHOM 1T MAY ooNoERN:

Be it known thatI, HENRY F. SHAW, of Wes'it Roxbury, in the county of Norfolk, and State of Massachub setts, have invented certain new and useful Imprbvements in Hoistng-Gear; and I do hereby declare that the following is a full and'exact description thereoffreference being had to the accompanying drawings, and to the letters of reference marked thereon. ,l

The nature of my invention consists in a ldevice for giving circular motion to a spur gear-wheel, by the oscillating motion of an internal ring-gear. l 1

To enable others skilled in the art to makeland use my invention, I willprocced to describe its construction and use. In the drawingsf. h Figure 1 is an end elevation of my improv/,led hoisting-gear.

Figure 2 is a vertical section through the ame. Figure 3 is side elevation of the same. v A B B represents the standard or framejin which my hoisting-gear is hung. C is the winding-barrel, made of wood or metal, as desirable. Attach d to one end of this Winding-barrel is a spur gear, D, figs. 1 and 2. Surrounding the gear-wheel D is a Aring-gear, H, as shown in the drawings. The ring-gear H is larger in diameter than the gear D, so that but a few o the teeth mesh together. The ring-gear H is attached perma- Y nently to the lever K, which has an'elongate slot, M, figs. l and 2, near' its lower end. Through'this slot a pin, L, passes, so that the lever K, with the r ug-gear H attached, is free to move up and down and to oscillate, so that all parts of the internal ring-gear Hy v ay be brought successively. into contact with all parts ofthe circumference of the gear D. The shaft S, igsl. 2 and 3, is independent of the barrel C, and is provided with a crank-pin, P, fig. 2, 'which passes through th lever K, so that whenever the shaft S is revolved it gives a vertical and an oscillating motion to the lever K and consequently causes the centre of the ring-gear H to traverse in a circle whose diameter is equal to the di erence of the diameters of the pitch lines of the spur-gear and the ring-gear. i i

If we cause the ring-gear H'to traverse as above described, its point of contact with the spur-gear D will P revolve around the said gear, and at` the same time will cause it to revolve on its own centre in the opposite direction, the leverage being in the ratio of the differences of the two diameters to the diameters of the spur-gear. If desirable, the ring-gear H may be atta hed permanently to the barrel, and `the spur-gear D be attached to the crank-shaft and lever K. Y Having thus described my invention, will proceed to set forth my claim. What I claim as my invention, und desire to secure by vLetters Patent, isl 1. The combination as well as the arr ngement of the ring-gear H and spur-gear D, operating as described and for the purpose set forth. l Y

2. The combination of the ring-gear I with the lever K, made substantially as described and for the purpose set forth.

HENRY F. SHAW.

Witnesses:

lFRANK G. PARKER,

A. HUN BERRY. 

